Ben is making pink paint by mixing paint in the ratio of 5 parts red paint to 2 parts white paint. If Ben wants to make 35 cans of the mixture and all cans hold the same volume of paint, how many cans of red paint will he need?

5 parts red to 2 parts white......5:2...added = 7 red : 5/7(35) = 175/7 = 25 cans red paint <==== white : 2/7(35) = 70/7 = 10 cans white paint